If the file was downloaded with a slightly different name (e.g., GGIW.7z (2).002 ), it will break the sequence. You must rename it to match the exact prefix of part .001 for the extraction to work.
If you have all parts but the extraction fails, you may need to use a hex editor to check the Start and End headers or use a repair tool . GGIW.7z.002
Ensure you have GGIW.7z.001 , GGIW.7z.002 , and any subsequent parts. If the file was downloaded with a slightly different name (e